I think I'd probably do a roll for you vs default +2 for the throw, to see how close you land to where you want... and then probably a roll vs default to see how well you nail the landing. "Default" here being my word for "everything is 0s"... but that's just at a glance without really trying to work it out or make sure it's balanced with the other ways to toss yourself around. It's probably what I'd end up using if you executed it in-turn, though.